Rotate the along the small circle by the angle indicated
We are rotating about an axis pointing north that is horizontal
Given two beds, one older than the younger, plot the poles to the planes (beds)
Move the younger pole to the east-west line and rotate the pole along the small circle to the center of the stereonet. This make the pole vertical and the bed horizontal
Rotate the older bed in the same direction and the same angle that the younger bed was rotated
Convert the older bed's pole to a plane and indicate its attitude
This is the same a Problem 6.2 but the lineation (magnetic direction) is what you are looking for